HyJet™ IV-Aplus

Performance profile

HyJet IV-Aplus is a fire-resistant Type IV phosphate ester aviation hydraulic fluid for commercial and business aircraft. It is superior to leading competitive Type IV fluids in the key areas of high-temperature stability, rust protection and density. It is the hydraulic fluid of choice for many of today’s airlines with mixed fleets.

Potential advantages and benefits

1 2 3Low density for light load weight and potential fuel savings

High-temperature stability for longer fluid and component life*

Helps extend component life and reduce costly repairs

Did you know?

HyJet IV-Aplus is the

lowest densityType IV fluid commercially available today.

*When compared to leading competitive Type IV fluids†Proprietary ExxonMobil Research and Engineering test

Longer in-service life

The Airbus NSA 307110 Ampoule Test† measures a fluid’s resistance to reaction with water (hydrolytic stability) and molecular breakdown at high temperatures (thermal stability).

time, hours

acid

num

ber,

mg/

KOH

/g

7

6

5

4

3

2

1

00 250 500 750 1000

HyJet IV-Aplus 565 hrsCompetitive Type IVCompetitive Type IV

Hydraulic fluid life (Ampoule test @ 0.5% water, 125°C)Testing confirmed that HyJet IV-Aplus offers better high-temperature stability and longer in-service life than competitive Type IV fluids tested.

OEM in-service max limit

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HyJet™ IV-Aplus

For more information

Please contact your ExxonMobil aviation sales representative.

Stronger corrosion control

The ASTM D 665A test identifies rust on polished steel rods that have been exposed to 10 percent water in fluid for 24 hours at 60°C. Water in normal concentrations of up to about 1 percent is soluble in the fluid and not a cause for rust-related concerns. However, in the absence of potent rust inhibitors in the fluid, if water concentration exceeds 3 percent, equipment damage can be rapid and severe.

Rust protection comparison

Recommended applications

For use in applications specifying:

• SAE Aerospace Standard AS1241C

• Airbus NSA307110N

• ATR NSA307110N

• Boeing BMS 3-11P, Type IV, Class 1 and Type V, Grade B and Grade C

• Boeing (Douglas Division) DMS 2014H

• British Aerospace (Avro) BAC.M.333C

• Bombardier/Canadair BAMS 564-003A

• Bombardier/de Havilland

• Cessna

• Commercial Aircraft Corporation of China (COMAC), CMS-OL-103

• Embraer

• Fokker

• Gulfstream Aerospace 1159SCH302J

• Lockheed C-34-1224C

Other type IVsHyJet IV-Aplus

Low density

Aircraft hydraulic systems are filled to a specific volume level. The weight of the fluid to achieve this volume is directly proportional to its density. A lower-density fluid results in less weight carried by the aircraft.

Estimated on 3,000 flight hours/year. Twin aisle aircraft may exceed 4,000 flight hours/year. Values are intended for comparison only.

Competitive Low Density

Competitive High Density

Aircraft TypeHydraulic System (gal/I)

Weight Savings (lb/kg)

Weight Savings (lb/kg)

A300, A310 105/400 11.4/5.2 53.4/24.2A319, A320, A321 62/235 6.7/3.0 31.5/14.3A330, A340 124/470 13.4/6.1 63.1/28.6A340-5/600 147/556 15.9/7.2 74.8/33.9A350 123/466 13.3/6.0 62.6/28.4A380 315/1192 34.2/15.5 not approvedB737-100/200 23/90 2.5/1.1 11.7/5.3B737-300-500-NG 35/130 3.8/1.7 17.8/8.1B747 178/670 19.3/8.8 90.6/41.1B757 78/300 8.5/3.8 39.7/18.0B767 81/310 8.8/4.0 41.2/18.7B777 178/670 19.3/8.8 90.6/41.1B787 91/344 9.9/4.5 46.3/21.0DC-9, MD-80, MD-90, B717 25/95 2.7/1.2 12.7/5.8DC-10, MD-11 125/470 14.4/6.5 63.6/28.8Embraer 170/175 24/91 2.6/1.2 12.2/5.5Embraer 190/195 29/110 3.1/1.4 15.0/6.7